Motor vehicle device



Feb.

C. D. STEWART MOTOR VEHICLE DEVICE Filed Sept. 12, 1927 INVENTOR CARLTON D. STEWART ATTORNEY Patented Feb. 16, 1932 UNITED STATES PATENT OFFICE CARLTON D. STEWART, OF BERKELEY, CALIFORNIA, 'ASSIGNOR TO THE WESTINGHOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYL'VAN A. CORPORATION OF moron vnmom mzvipm Application filed September 12, 1927. Serial No. 219,157.

This invention relates to motor vehicles'of the type in which an 1nternal combustion engine provides the motive power. 1

It has been proposed to make use of the vacuum creating property of the suction manifold of an internal combustion engine to provide a vacuum for operating various auxiliary. devices, such as the motor vehicle brakes.

Air is supplied to the engine in creating and maintaining a vacuum for operating an auxiliary device and this is liable tointerfere with the starting of the engine in some cases,

particularly when the'weather is'cold and a rich fuel mixture is desired in starting.

In order to obviate this difficulty, the principal object of my invention is to provide means for cutting ofi' communication through which the vacuum is created for controlling an auxiliary device:

In the accompanying drawing, the single figure-is a diagrammatic view 0 the suction manifold andcarburetor of an internal combustion engine, showing my invention applied thereto. 2

In the drawing fold'l having. a carburetor 2 associated-therewith in the usual manner, and connected to said manifold is a pipe 3 through which-a vacuum is created for controlling an auxiliary device 4.

According to my invention, a valve 5 is provided in the pipe 3 havingan operating arm 6' and said arm is operatively connecte to the usual push rod 7, which isemployed to effect the starting of the engine. A lever 8, centrally fulcrumed on a pin 9, is-pivotally position,

connected to the rod.7 at one end and'to the arm 6 ,at the other end.

Normally, the valve 5 is held in its 0 en as shown in the drawing, so t at air from the device 4 flows through pipe 3 to the suction manifold 1 and this creates a vacuum in connection with the device 4. When the rod 7 is pressed down in order to is shown a suction mani-.

pipe, an auxiliary device connecte start the engine, the valve 5 is operated through the movement of the lever 8 and the arm 6, so as to cut ofi communication through the pipe 3 and thus prevent the supply of air through said pipe to the suction manifold at the time the engine is being started.

While one illustrative embodiment of the invention has been described in detail, it is not my intention to limit its scope. to that embodiment or otherwise than by the terms of the appended claims.

Having now described my Patent, is r 1. The combination with a suction manifold of an internal combustion engine, of a invention, what I claim as'new and desire to secure by Letters pipe connected to said manifold, an auxiliary device connected to said pipe and operable by the vacuum created in the manifold, and means operated upon startingthe engine for closing communication through said pipe to the manifold.

2. The combination with a suction manifold of an internal combustion engine, of a pipe connected to said manifold, a vacuum operated device connected to said pipe, a valve in said pipe, and means operated in starting the en us for operating said valve.

'3. The combination with a suction manifold of an internal combustion engine, of a pipe connectedto said manifold, an auxiliabiiy device connected to said pipe and opera by the vacuum created in the manifold, a valve for controlling communication through said pipe,and a member operable to effect t e starting ofthe engine and operatively connected to said valve. 1

- 4. The combination with a suction manifold of aninternal combustion engine, of a pipeconnected to said controlling to sai pipe and operableby the vacuum created in thezmanifold, a push rod operable to effect the starting: of the engine, and an operat've manifold,'a valve for. communication through saig connection between said valve and said rod.

5. In combination, a suction manifold of an internal combustion engine, a pipe connected to said manifold, an auxiliary device connected to said pipe and, operable by the vacuum created in the manifold, a member operable to effect the and a valve in said pipe and operatively connected to said member, said valve being moved to close communication through said pipe upon movement of said member to effect the starting of the engine.

In testimony whereof I have hereunto set my hand.

' CARLTON D. STEWART.

starting of the engine,' 

